Tebing



C. F. KETTERING AND W. A. CHRYST.

" ENGINE swarms SYSTEM.

APPLICATION FILED OCT. 31, I917.

1,39 1,1 94, PatentodSept. 20,- 1921.

m mum". 6 2 sums-sum z. 3 I V with the yoke or groove 35, while theiropposite ends are secured in iron armature blocks 37, fitted to slide inreceptacles formed by the pole pieces of the dynamo, and covers 38, asshown in Fig. 4.

In Fig. 2 the above described elements are shown in their normalposition, but as suming the field magnets of the dynamoeleetric-machineto be strongly energized, its frame Or pole pieces will tend to draw theblocks 37 toward the gear wheels. This will move the gear wheel 34 andclutch 32 to the right against the force of a spiral spring 39, andbring the gear 34 and pinion 25 and pinion 33 and gear 27 into mesh.These parts are returned to normal position by spring 39 as soon as thecircuit in the dynamo-electricmachine is interrupted.

The result of the meshing of the gears above set forth is as follows:When the circuit to the dynamo-electric-machine is closed, the latterwill slowly rotate and shift the clutch to the right to establish thegearing connection described. The cranking operation of the engine willthus be effected and the shaft 24 will be turned in an anticlockwisedirection. The rollers 2S'of the clutch 26 traveling to the wide portionof the notches will now slip, but the clutch 32 will bind, and powerwill then be transmitted through the pinion 25, the gear wheel 34, thepinion 33, the gear wheel 27 and the projection 30 to the timing gearsof the engine. As soon as the engine becomes selfactuated, its speedwill greatly increase, which will result in the projection 30 beingdriven by the engine instead of by the dynamo-electric-machine,whereupon the gear 27 will be rotated in a counter-clockwise direction,which will result in locking the clutch 26 thereby causing a directdrive of the shaft 24. At the same time, the pinion 33 will be rotatedby the gear 27 in a clockwise direction, whereby the rollers of clutch32 will be caused to slip, thus preventing any ill effect due to thedifference in speed between the two gear wheels 27'and 34.

Upon reference to Fig. 4, will be seen in,

section the field coils of coarse wire, represented by large squares 61,andv field coils of fine wire, represented by small squares 51. It is tobe understood that when the -dynamo-electric-machine is operating tomachine is used as a generator, the magnetic field employed is too weakto hold the armature blocks 37 in attracted position against thecompression of spring 39, hence the spring will overcome the weakmagnetic field and cause unmeshing of the gears. As already pointed out,this unmeshing action may take place while armature shaft 24 is directlydriven through parts 30, 27, and 26.

-While the form of mechanism herein shown and described constitutes apreferred form of embodiment of the invention, it is to be understood.that other forms might be adopted, all coming within the scope of theclaims which follow.

What we claim is as follows 1. In an engine starter, the combinationwith dynamo-electricmachine having an armature and field magnets; ofmeans for connecting the engine and machine including a movable member;and means for actuating said movable member including a part independentof said armature and shiftable into proximity to adjacent poles of saidfield magnets by magnetic attraction.

2. In an engine starter, the combination with a dynamo-electric-machinehaving an armature and field magnets; of gearing between the same andthe engine,eomprising fixed and axially movable gears; a rod slidablymounted on the dynamo frame; a movable member connected to the rod andcooperating magnetically with the magnets of the dynamo; connectionsbetween the rod and the movable gear, whereby the gears are thrownintomesh whenthe field magnets are energized, as set forth.

3. In an engine starter, the combination with a dynamo-electric-machinehaving an armature and field magnets; of gearing between the same andthe engine ;said machine operating with a strong magnetic field to startthe engine, and operating with a weak magnetic field when driven as agenerator by the engine; a movable member cooperating magnetically withthe magnets in the dynamo; connections between the same and the gears,whereby the latter are thrown into mesh when the field magnets areenergized; means operating when the generator field is in operation tothrow the gears out of mesh; and independent means acting automaticallyto connect the machine to the engine when driven as a generator.

4. In an engine starter the combination 1,391,194 a i I 8;

with a dynamo-electrie-machine having an armature and'field magnets; ofgearing between the same and the engine; said machine operating with astrong magnetic field to start the engine, and operating with a a weakermagnetic field when driven as a generator by the engine; meansindependent of the armatureof the machine and cooperating with the fieldmagnets to be actuated by the stronger magnetic field to throw the gearsinto mesh ;"means capable of operation against the weaker magnetic fieldto throw the gears outiof mesh; and independent meansto transmit motionfrom the engine to the machine, when running as a generator. 5. In anengine starter, the combination with a dynamo-electric-machine having anarmature and field magnets; of gearing betweenthe same and the engine;said machine foperatingwith a strong magnetic field to start the engine;and operating with a weaker magneticffield when driven as a generator bythe engine; means independent of the armature ,ofthe machine andcooperating with theifieldcmagnets to be actuated by the strongermagnetic field to throw the gears into mesh; a spring capable ofoperation 1 against, the wea er magnetic field to throw the gears out of"mesh; and independent means to transmit motion from the engine to themachine when running as a generator.

6. In an enginestarter, the combination with a; dynamo-electric-machinehaving an armature and field magnets; of v a direct *drive and speedreduction gearing between the" same and the eng1ne; sa1d machineoperating with a" strong magnetic field to drive the engine through thereduction gearing, the direct drive not being operative; saidmachineoperatlngvwith a weaker mag-V netic field-when being driven as 'agenerator through the direct drive, the reduction gearing not beingoperative means independent of the armature of the machine andcooperatingwith the field magnets to be actuated by the strongermagnetic fieldto move the reduction gearing into operation; and meansoperative against the weaker magnetic field I to move the reductiongearing out of opera-,

tion.

7. In an engine starter, the combination with an engine of adynamo-electric-maa I chine having an armature and field magnets, 7

including plurality of pole pieces, adjacent pole pieces being formed soas to cooperate together to provide a recess at theside of the machine;of gearing between the machine and the engine including axially movablegears; a rod slidably mounted on the dynamo frame; a block connected tothe rod and adapted to move into the recess when attracted by themagnets ofthe dynamo; and y i connections between the rod andthe movablegear whereby the gears are thrown into mesh when the fieldmagnets areenergized. 8. In an engine starter; th'ejcombination with adynamo-electric-machine having an armature and field magnetsyof meansfor connecting the :engine and machine includ-' ing ashiftab1e gear; andmeans for actuating said gear including a part independent of saidarmature and shiftable into proxe imity to adjacent poles of said fieldmagnets bymagnetic attraction. I v

9. In an engine starter; the combination with a dynamo-electric-machinehaving an tures. I

' CHARLES F. KETTERING;

WILLIAM A. CHRYST.

Witnesses: I WARREN SCHMIIEDING,

WALTER W. RmoEL.

In testimony whereof we afii'x our signa

